... and not "I can just squeeze by." I'm talking about the red light on top of the yellow and green ones of the traffic signal.
Recently I was driving by a car accident, when I noticed an acquaintance of mine standing by his wrecked car on the road. I stopped to make sure he was ok, and to see if I could do anything to help. He got hit by a car running the traffic light, confirmed by several witnesses who stayed behind to relate this to the police.
It only takes a few minutes to wait for the next green light. But it takes much longer for the wreckage of your car and yourself to be cleaned up from the road. It doesn't make any sense to run the light. It is not only very rude, but bloody inconvenient for you and the driver you're hitting, not to speak of the danger. Your turn was when the light was green, if it's red, it's someone else's turn. I didn't think that is so tough to understand.